The present invention relates generally to the cytoprotective activity of mixed muscarinic inhibition/PARP modulation and in particular to the use of dual inhibitors of M1 muscarinic receptor and poly(ADP-ribose) polymerase (PARP) as epithelioprotective medicaments, particularly as medicaments for the prevention and/or treatment of at least one of the common lung diseases associated with a significant inflammatory component such as severe sepsis, acute lung injury, acute respiratory distress syndrome, cystic fibrosis, asthma, allergic rhinitis, chronic obstructive pulmonary disease, pulmonary fibrosis, systemic sclerosis, pneumoconiosis or lung cancer. Particularly preferred compounds are condensed diazepinones, e.g. condensed benzodiazepinones such as pirenzepine or compounds which are metabolized to condensed benzodiazepinones such as olanzapine.